[PATCH net-next v3] net: mana: Add handler for sriov configure
From: Haiyang Zhang <hidden>
Date: 2026-07-08 21:00:28
Also in:
lkml, netdev
Subsystem:
hyper-v/azure core and drivers, networking drivers, the rest · Maintainers:
"K. Y. Srinivasan", Haiyang Zhang, Wei Liu, Dexuan Cui, Long Li, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Haiyang Zhang <haiyangz@microsoft.com> Add callback function for the pci_driver / sriov_configure. It asks the NIC to provide certain number of VFs, or disable VFs if the request is zero. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> --- v3: Updated sriov disabling paths suggested by Paolo Abeni v2: No longer change VF autoprobe as discussed with Leon Romanovsky and Bjorn Helgaas. --- .../net/ethernet/microsoft/mana/gdma_main.c | 26 +++++++++++++++++++ 1 file changed, 26 insertions(+)
diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c
index aef3b77229c1..80a9118a90bc 100644
--- a/drivers/net/ethernet/microsoft/mana/gdma_main.c
+++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c@@ -2456,6 +2456,8 @@ static void mana_gd_remove(struct pci_dev *pdev) { struct gdma_context *gc = pci_get_drvdata(pdev); + pci_disable_sriov(pdev); + mana_rdma_remove(&gc->mana_ib); mana_remove(&gc->mana, false);
@@ -2517,6 +2519,8 @@ static void mana_gd_shutdown(struct pci_dev *pdev) dev_info(&pdev->dev, "Shutdown was called\n"); + pci_disable_sriov(pdev); + mana_rdma_remove(&gc->mana_ib); mana_remove(&gc->mana, true);
@@ -2525,6 +2529,27 @@ static void mana_gd_shutdown(struct pci_dev *pdev) pci_disable_device(pdev); } +static int mana_sriov_configure(struct pci_dev *pdev, int numvfs) +{ + int err = 0; + + dev_info(&pdev->dev, "Requested num VFs: %d\n", numvfs); + + if (numvfs > 0) { + err = pci_enable_sriov(pdev, numvfs); + } else { + if (pci_vfs_assigned(pdev)) { + dev_warn(&pdev->dev, + "Cannot disable SR-IOV while VFs are assigned\n"); + return -EPERM; + } + + pci_disable_sriov(pdev); + } + + return err ? err : numvfs; +} + static const struct pci_device_id mana_id_table[] = { { PCI_DEVICE(PCI_VENDOR_ID_MICROSOFT, MANA_PF_DEVICE_ID) }, { PCI_DEVICE(PCI_VENDOR_ID_MICROSOFT, MANA_PF2_DEVICE_ID) },
@@ -2540,6 +2565,7 @@ static struct pci_driver mana_driver = { .suspend = mana_gd_suspend, .resume = mana_gd_resume, .shutdown = mana_gd_shutdown, + .sriov_configure = mana_sriov_configure, }; static int __init mana_driver_init(void)
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2.34.1